Cooling Mode Controlled According To Demand And Humidity; Erp Class - Bosch Src 100 Rf Installations- Und Bedienungsanleitung

6.9 Cooling mode controlled according to demand and
humidity
When the heating circuit/cooling circuit is in cooling mode, the flow
temperature is determined according to demand, when considering the
current humidity and certain setting parameters in the UI 800. The aim
is to operate the cooling mode as efficiently as possible and free of
condensation.
Demand-controlled
If no room (individual control) requests cooling capacity, no request is
sent to the heat pump and the heat pump therefore remains switched
off.
In a non-networked system, the heat pump produces cold water
regardless of whether cooling capacity is required in the rooms and
therefore consumes electricity.
Condensation protection
Each individual control for the underfloor heating system has an air
humidity sensor. If this sensor measures a relative humidity of more than
approx. 70 %, the individual control of the underfloor heating system
stops the cooling in the room affected (closes the relevant underfloor
heating system valve).
To determine the flow temperature, the relative humidity and the
measured room temperatures of all individual controls with an active
cooling requirement are considered. The dew point is calculated from
the measured relative humidity and the room temperature. The room
(individual control) with the highest dew point is decisive for
determining the flow temperature. This is because the probability of
condensation is highest in this room compared to the other rooms.
7

ErP class

The class of the temperature control is required to calculate the room heating energy efficiency of an integrated system and is for this reason
incorporated into the system data sheet.
Functions of the individual control
UI 800 Control type = Individual control
Weather-compensated with influence of room temperature, modulating heat generator
UI 800 Control type = Weather-compensated
Weather-compensated, modulating heat generator
1) Radiator or underfloor heating system
Table 2 Classification of the control system according to ErP (EU 811/2013; (EU) 2017/1369)
SRC 100 RF – 6721856014 (2024/11)
A safety margin is added to the dew point. If this sum is higher than the
minimum flow temperature it is used as the set flow temperature.
Example:
• Dew point temperature 16 °C
• Safety margin 5 K
• Minimum set flow temperature = 20 °C
The sum of the dew point temperature and safety distance is 16 °C + 5 K
= 21 °C. This temperature is above the minimum set flow temperature
and is therefore the set flow temperature.
The safety distance and the minimum set flow temperature can be set via
UI 800.
Fig. 23 Example UI 800
Compared to systems with only one humidity sensor, dew point
monitoring takes place in all rooms with networked individual controls
and therefore offers significantly greater security against condensation.
UI 800, outside temperature sensor, K 30 RF/
up to 2 individual
controls
VI / 4.0
V / 3.0
ErP class
0010047326-001
ErP class / %
K 40 RF and
from 3 individual
1) 1)
controls
VIII / 5.0
V / 3.0
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